[jira] [Commented] (KAFKA-867) producer transaction issue when metrics lib not correct

["Jun Rao (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13638043#comment-13638043 ] 

Jun Rao commented on KAFKA-867:
-------------------------------

Could you try the latest of the 0.8 branch? We have fixed kafka-826 and use the latest stable published metrics package.
                
> producer transaction issue when metrics lib not correct
> -------------------------------------------------------
>
>                 Key: KAFKA-867
>                 URL: https://issues.apache.org/jira/browse/KAFKA-867
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Ian Roughley
>
> When building a producer, I used a different version of metrics (v2.2.0).  What I found in this case was that I could deploy a producer, however the consumer received 4 copies of each message I sent.
> Further investigation let to:
> - the timer start method was found in the producer code
> - the message was sent to the broker
> - the timer method was not found in the producer code, causing an exception to be thrown
> - the exception caused a retry (3 times)
> - as the message was already at the broker, there was no rollback
> Not sure if this warrant a higher level of handshaking with the broker.  But it is a fairly simple issue to cause (given kafka's currently buit with a non-published metrics version), that may cause miss-understanding.

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